Just wanted to add to this one, I have the same issue, I can copy the contents of the audio cd to a folder and open the items from there, but i can not open disc directly from vlc.
pkg_info | grep libdvdcss :
libdvdcss-1.2.10_1 Portable abstraction library for DVD decryption
I get this error message in vlc :
Your input can't be opened:
VLC is unable to open the MRL 'cdda:///dev/acd0'. Check the log for details.
So there it is.
I'm otherweise very happy with this excellent OS, PC-BSD 9 64bit, the final release, using XFCE as DE on a ASrock 330HT mini computer.
My guess is that the location specified in vlc is not correct (but the again I'm only a amateur user)
Any help on how (or if?) this can be resolved would be great